Configuration
L9-2(3)
Within the Generic Desktop Usage Page, the usage tag suggests that the group
of controls is for controlling a mouse. A mouse collection typically consists of
two axes (X and Y) and one, two, or three buttons.
L9-2(4)
The mouse collection is started.
9
L9-2(5)
Within the mouse collection, a usage tag suggests more specifically that the
mouse controls belong to the pointer collection. A pointer collection is a
collection of axes that generates a value to direct, indicate, or point user
intentions to an application.
L9-2(6)
The pointer collection is started.
L9-2(7)
The Buttons Usage Page defines an Input item composed of three 1-bit fields.
Each 1-bit field represents the mouse’s button 1, 2 and 3 respectively and can
return a value of 0 or 1.
L9-2(8)
The Input Item for the Buttons Usage Page is padded with 13 other bits.
L9-2(9)
Another Generic Desktop Usage Page is indicated for describing the mouse
position with the axes X and Y. The Input item is composed of two 8-bit fields
whose value can be between -127 and 127.
L9-2(10)
The pointer collection is closed.
L9-2(11)
The mouse collection is closed.
149
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